#bmc_right {
    height: 100%;
    padding: 8px;
    flex: auto;
    float: left;
    width: 600px;
    margin-left: 14px;
    border: 2px solid #0f73c1;
}

.div_dropdown .dropdown {
    float: left;
}

.bmc_menu {
    float: left;
}